Highly Efficient and Ultralong Afterglow Emission with Anti-Thermal Quenching from CsCdCl 3 : Mn Perovskite Single Crystals
Triplet exciton-based long-lived phosphorescence is severely limited by the thermal quenching at high temperature. Herein, we propose a novel strategy based on the energy transfer from triplet self-trapped excitons to Mn dopants in solution-processed perovskite CsCdCl . It is found the Mn doped hexa...
Saved in:
Published in | Angewandte Chemie International Edition Vol. 61; no. 51; p. e202210975 |
---|---|
Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Germany
19.12.2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Triplet exciton-based long-lived phosphorescence is severely limited by the thermal quenching at high temperature. Herein, we propose a novel strategy based on the energy transfer from triplet self-trapped excitons to Mn
dopants in solution-processed perovskite CsCdCl
. It is found the Mn
doped hexagonal phase CsCdCl
could simultaneously exhibit high emission efficiency (81.5 %) and long afterglow duration time (150 s). Besides, the afterglow emission exhibits anti-thermal quenching from 300 to 400 K. In-depth charge-carrier dynamics studies and density functional theory (DFT) calculation provide unambiguous evidence that carrier detrapping from trap states (mainly induced by Cl vacancy) to localized emission centers ([MnCl
]
) is responsible for the afterglow emission with anti-thermal quenching. Enlightened by the present results, we demonstrate the application of the developed materials for optical storage and logic operation applications. |
---|---|
ISSN: | 1433-7851 1521-3773 |
DOI: | 10.1002/anie.202210975 |